A guide for overthrowing dictatorships, two adopted orphans return to China, and Orcas can talk ... sort of

Political activists around the world remember Gene Sharp, whose theories and tactics of nonviolence provided organizers with a realistic alternative to violent conflict. Sharp passed away earlier this week. Plus, we'll hear about the crackdown on Kenyan media following a political stunt by an opposition figure. And orcas have a go at mimicking human speech.